The gsl package includes the GNU Scientific Library (GSL). The GSL is a
collection of routines for numerical analysis, written in C.
It now includes a random number suite, an FFT package, simulated annealing
and root finding. In the future, it will include numerical and Monte Carlo
integration and special functions.
Linking against the GSL allows programs to access functions which can
handle many of the problems encountered in scientific computing.
These are the static libs and include headers for developers.